// 一维数组
let arr1 = [1,2,3]

// 二维数组
let arr2 = [1,2,3,[4,5,6]]
let [a,b,c,[d,e,f]] = arr2
console.log(a) // 1
console.log(b) //2 
console.log(c)//3
console.log(d)//4
console.log(e)//5
console.log(f)//6

